相关疑难解决方法(0)

我有一个BufferedImage我正在尝试写一个jpeg文件,但是我的Java程序抛出异常.我能够成功地将相同的缓冲区保存到gif和png.我曾尝试在Google上寻找解决方案,但无济于事.

码:

   File outputfile = new File("tiles/" + row + ":" + col + ".jpg");
   try {
       ImageIO.write(mapBufferTiles[row][col], "jpg", outputfile);
   } catch (IOException e) {
        outputfile.delete();
        throw new RuntimeException(e);
   }

例外:

 Exception in thread "main" java.lang.RuntimeException: javax.imageio.IIOException: Invalid argument to native writeImage
 at MapServer.initMapBuffer(MapServer.java:90)
 at MapServer.<init>(MapServer.java:24)
 at MapServer.main(MapServer.java:118)
 Caused by: javax.imageio.IIOException: Invalid argument to native writeImage
 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeImage(Native Method)
 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeOnThread(JPEGImageWriter.java:1055)
 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.write(JPEGImageWriter.java:357)
 at javax.imageio.ImageWriter.write(ImageWriter.java:615)
 at javax.imageio.ImageIO.doWrite(ImageIO.java:1602)
 at javax.imageio.ImageIO.write(ImageIO.java:1526)
 at MapServer.initMapBuffer(MapServer.java:87)
 ... 2 more

我正在尝试实现计算RGB和CMYK之间转换的解决方案,反之亦然.这是我到目前为止:

  public static int[] rgbToCmyk(int red, int green, int blue)
    {
        int black = Math.min(Math.min(255 - red, 255 - green), 255 - blue);

        if (black!=255) {
            int cyan    = (255-red-black)/(255-black);
            int magenta = (255-green-black)/(255-black);
            int yellow  = (255-blue-black)/(255-black);
            return new int[] {cyan,magenta,yellow,black};
        } else {
            int cyan = 255 - red;
            int magenta = 255 - green;
            int yellow = 255 - blue;
            return new int[] {cyan,magenta,yellow,black};
        }
    }

    public static int[] cmykToRgb(int cyan, int magenta, int yellow, int black) …